长距离输水隧洞工作机制研究对于实现国家水资源优化配置有重要创新意义。本项目拟以典型跨流域调水工程引水隧洞建设为依托，通过室内模型试验、不连续数值模拟和理论分析等研究手段，揭示隧洞内部输水、围岩外部环境地下水、隧洞衬砌结构及其不同运行工况等因素相互作用机制；建立内外水相互作用下围岩-衬砌结构性能时效劣化模型与连续-非连续力学分析方法；揭示多场耦合作用下输水隧洞围岩-衬砌结构联合承载机理和性状演化规律。可望为我国长距离调水工程等生命线工程的设计、建造及运行提供重要的理论支撑和科学决策依据。

It is of innovative importance for optimizing national water resources allocation to study the mechanisms of long-distance diversion tunnels. In this project, on the basis of typical water diversion projects across different river basins, laboratory model experiments, discontinuous numerical simulations combined with theoretical analysis will be conducted to study the mutual mechanisms between the inner water, the outer underground water and the tunnel lining structure under different operation conditions. The aging and degradation model of the tunnel and surrounding rock under the inner and outer water pressure, combined with the continuity and non-continuity method, is established to reveal the joint bearing mechanism and character evolution of surrounding rock and lining structure under multi-field coupling effects. This study will serve as the critical theoretical support and scientific decision-making for the design, construction and operation of major long-distance diversion projects in China.